In-cylinder Ion Sensing Opportunities

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Summary - (Cont.)• Cold start is a very important area for ion sensingto apply for– AF ratio estimation: could be a neuralnetwork model– Could be useful as feedback for closed loopAir/Fuel ratio control during the engine warmup period when the oxygen sensor iswarming up.
Summary - (Cont.)• Engine operating conditions have strong effectson ionization detection,– including the location of peak ionization,peak magnitude and area covered byionization• Calibration issue must be resolved– idle condition can be used as an on-linecalibration point for the ionizationmeasurement after the oxygen sensorwarms up.• Measurement derived from the ion signals can behelpful for optimizing engine combustion
Page 1 and 2: Designing Electronic Powertrain Con
Page 3 and 4: What Is Ion Sensing?• Ion Sensing
Page 5 and 6: Mechanism of In-cylinder Ion Sensin
Page 7 and 8: Mechanism of In-cylinder Ion Sensin
Page 9 and 10: Example Hardware ofIn-cylinder Ion
Page 11 and 12: Current EffortsEarly knock detectio
Page 13 and 14: Knock Detection at High SpeedIon si
Page 15 and 16: Further Improvement Needed forQuant
Page 17 and 18: Fundamental Research - (Cont.)1.4Ig
Page 19 and 20: Location & Magnitude of Ionization
Page 21 and 22: Speed Effect on Ion SignalIonizatio
Page 23 and 24: Equivalence Ratio Effects atHigher
Page 25 and 26: Location of Peak Ionization Signal-
Page 27: Summary• The development of ion s

In-cylinder Ion Sensing Opportunities

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